When the equation kcio3(s)> kci(s)+o2(g) is balanced, the coefficient of kcio3 is what?

The coefficient of is 2

Explanation:

The Balanced Chemical equation is :

This reaction is balanced because total number of atoms of different elements in reactant is equal to total number of atoms in products.

Reactant : 2

Number of K atoms = (2)1 = 2

Number of Cl atoms = (2)1 = 2

Number of O atoms = (2)3 = 6

Product : 2 KCl and 3

In KCl

Number of K atoms = (2)1 = 2

Number of Cl atoms = (2)1 = 2

In  

Number of O atoms = (3)2 = 6

So ,

this equation is balanced and follow Law of Conservation of Mass because :

Number of K atom  in reactant = product = 2

Number of Cl atom  in reactant = product = 2

Number of O atom  in reactant = product = 6

b is the correct

i think   the answer is c hope i'm right